I came across equations in a math book that contains absolute of both x and y. I have done many complicated absolute equations and inequalities, but with only the x being in absolute bars. I don't even know how to start off to analyze a situation of this type.
Here are some examples:
1) |x| + |y+2| = 1
2) |x| - |y| = 1
3) x = 4 - |y|
Hope someone can help with these type of equations.